Answer :
B. Most wind erosion happens in deserts, beaches, and plowed fields.
If an object has a density of 25 g/cm and a mass of 100 grams, what is its volume? O 40 cm3 0.25 cm 4 cm3 125 cm3
4 cm³
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtract Property of EqualityChemistry
Gas Laws
Density = Mass over Volume
D = m/V Explanation:Step 1: Define
D = 25 g/cm³
m = 100 g
Step 2: Solve for V
Substitute variables [D]: [tex]\displaystyle 25 \ g/cm^3 = \frac{100 \ g}{V}[/tex]Multiply V on both sides: [tex]\displaystyle V(25 g/cm^3) = 100 \ g[/tex]Isolate V: [tex]\displaystyle V = 4 \ cm^3[/tex]The accepted density of water at 25oC is 0.99707 g/mL. Calculate the percent error forbothBeakers A and B.
Answer:
Percent error for beaker A is 0.26%
Percent error for beaker B is 0.25%
Explanation:
The remaining part of the question is shown in the attachment below.
For beaker A
Mass of water = 9.997 g
Volume = 10mL
First, we will determine the experimental density
From
Density = Mass / Volume
∴ Density = 9.997g / 10mL
Density = 0.9997 g/mL
To calculate the percent error
Percent error = (Error/True value) × 100%
Error = Experimental value - True value
From the question, True value = 0.99707 g/mL
Experimental value = 0.9997 g/mL
∴ Error = 0.9997 g/mL - 0.99707 g/mL
Error = 0.00263 g/mL
Then,
Percent error = (0.00263/0.99707) × 100%
Percent error = 0.26377%
Percent errror ≅ 0.26%
Hence, percent error for beaker A is 0.26%
For beaker B
Mass of water = 9.9956 g
Volume = 10mL
Also, we will first determine the experimental density
From
Density = Mass / Volume
∴ Density = 9.9956g / 10mL
Density = 0.99956 g/mL
To calculate the percent error
Percent error = (Error/True value) × 100%
Error = Experimental value - True value
True value = 0.99707 g/mL
Experimental value = 0.99956 g/mL
∴ Error = 0.99956 g/mL - 0.99707 g/mL
Error = 0.00249 g/mL
Then,
Percent error = (0.00249/0.99707) × 100%
Percent error = 0.24973%
Percent errror ≅ 0.25%
Hence, percent error for beaker B is 0.25%
2 points
A student saw the Moon rise at 6:20 a.m. on Monday. If he wants to see
the Moon rise again on Tuesday, vhat time should he look in the sky?(Mark
the one best answer.)
About 6:20 am
About 6:20pm
About 5:30 am
About 7:10am
Which two mantle hot spots are located at mid-ocean
ridges?
Answer:
This region of thick, hot crust and mantle extends 1,300 kilometers north and south of the Iceland hotspot and some 1,000 kilometers north and south of the Azores hotspot. Together, the two hotspots appear to be feeding a huge supply of magma to nearly the entire northern segment of the Mid-Atlantic Ridge.
Explanation:
please give me a heart
Answer:
Easter island
How many grams are in 4.7 moles of Na2O?
290 g Na₂O
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisExplanation:Step 1: Define
4.7 mol Na₂O
Step 2: Identify Conversions
Molar Mass of Na - 22.99 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of Na₂O - 2(22.99) + 16.00 = 61.98 g/mol
Step 3: Convert
Set up: [tex]\displaystyle 4.7 \ mol \ Na_2O(\frac{61.98 \ g \ Na_2O}{1 \ mol \ Na_2O})[/tex]Multiply: [tex]\displaystyle 291.306 \ g \ Na_2O[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
291.306 g Na₂O ≈ 290 g Na₂O
PLEASE HELP PLEASEEESSSS
Answer:
The answer is C or 3 which ever but it that one
Explanation:
You have 11 blue cars, 7 red cars and 4 green cars
What percent of cars are green?
Answer to 1 Decimal Place (Check your rounding)
Emitted energy is reported in megaelectron volts (MeV), where one MeV is equal to one million electron volts. How much energy is emitted in this reaction?
Answer:
1.44
Explanation:
Science happened in my brain
4. How many grams of acetylene would be given off if the limiting reagent in the reaction is calcium carbide and you start with 2.00 g
Answer:
0.78 g of acetylene.
Explanation:
The equation of the reaction is;
CaC2(s) + 2H2O (l) ------> Ca(OH)2(aq) + C2H2(g)
We have been told that CaC2 is the limiting reactant.
Number of moles of CaC2 = 2g/ 64 g/mol = 0.03 mol
If 1 mole of CaC2 yields 1 mole of acetylene
0.03 moles of CaC2 yields 0.03 moles of acetylene
Mass of acetylene = number of moles * molar mass
Molar mass of acetylene = 26 g/mol
Mass of acetylene = 0.03 moles * 26 g/mol
Mass of acetylene = 0.78 g of acetylene.
Why is it important to have control???
Answer:
A control is important for an experiment because it allows the experiment to minimize the changes in all other variables except the one being tested.
Explanation:
do u mean that kind of control
Write a balanced equation describing the reduction of H2SeO4 by SO2 to produce selenium. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.)
Answer:
[tex]\mathbf{H_2SeO_{4(aq)} + 3SO_{2(aq)} + 2H_2O_{(l) } \to Se_{(s)} + 3H_2SO_{4(aq)} }[/tex]
Explanation:
We are to write a balanced equation from the information given above by including the states of their matter according to SATP conditions;
[tex]\mathbf{H_2SeO_{4(aq)} + 3SO_{2(aq)} + 2H_2O_{(l) } \to Se_{(s)} + 3H_2SO_{4(aq)} }[/tex]
From above;
The oxidizing agent is [tex]\mathbf{H_2SeO_{4(aq)} }[/tex]
The reducing agent is [tex]\mathbf{SO_{2(aq)} }[/tex]
11)
B.
A.
D.
Which position represents spring in the southern hemisphere?
A)
А
B)
B
C)
С
D)
D
Answer:
Cccccccccccccccccccccccccccccccccccccccccccc
What percent of iodine is left after 5 half-lives have passed? will brainlist
Answer:
3.125%
Explanation:
After 1 half life it remains 50%
After 2 half lines it remains 25%
After 3 half lines it remains 12.5 %
After 4th half life it remains 6.25%
After 5th half life it remains 3.125%
Are the nuclei of all atoms
a) Positive
b) Negative
c) Neutral
The density of benzene is 0.879g/mL. The volume (with 1 decimal) of 131.9g sample of benzene is how many mL?
Answer:
150.1 mL
Explanation:
Step 1: Given data
Density of benzene (ρ): 0.879 g/mLMass of the sample of benzene (m): 131.9 gVolume of the sample of benzene (V): ?Step 2: Calculate the volume of the sample of benzene
Density is an intrinsic property. It is equal to the quotient between the mass and the volume of the sample of benzene.
ρ = m/V
V = m/ρ
V = 131.9 g/(0.879 g/mL)
V = 150.1 mL
What reactive species is produced in the initiation step of the free radical chlorination of 2,2-dimethylpropane
Answer:
See explanation
Explanation:
An initiation step is the first step in a free radical mechanism. In this step, free radicals are generated from a stable compound. The initiation step tends to increase the concentration of radicals present in the system. It leads to a net increase in the number of free radicals in the system.
For the chlorination of 2,2-dimethylpropane, the initiation step is;
Cl2 + hv --------->2Cl.
Note that hv is used to represent light
What causes a spectrum of colors to appear when light moves through a prism?
Absorption of light waves
O Refraction of light waves
Transmission of light waves
Reflection of light waves
Answer:
It is refracted out, B
Explanation:
When the light travels through the prism, it refracts the colors out of it. In which a rainbow sort coloration is released from the other side.
Answer:
Explanation:
Refraction of light waves
Moving glaciers can cause erosion ?
True or false
Plz explain
Answer:
true
Explanation:
plucking and abrasion
abrasion is when a glacier scrapes rocks below and plucking is when sediments are picked up by a glacier
Please help me thanks so much....I’ll mark you?!?!:))))
Answer:
chemical
Explanation:
Which way does heat transfer from warm objects to cool objects, or from cool objects to warm objects?
A student is investigating potential and kinetic energy by stretching a spring across a table. When the student lets go
The spring recoils.
Answer: When the spring is recoiling
Explanation:
Answer:
When the spring is recoiling
Explanation:
why do pengiuns have beards
Answer:
no they do not
Explanation:
Answer:
It's just...Hair grown there...i guess it just grows as a male humans would
Explanation:
hope this helps.
d. Calculate the initial reaction rate that would be seen in a solution in which [BF3] is 5.0 x10 -1M and [NH3] is 2.0 x10 -2 M
Answer:
[tex]r=0.0341\frac{M}{s}[/tex]
Explanation:
Hello!
In this case, considering the given table, we are able to represent the symbolic rate law as shown below:
[tex]r=k[BF_3]^m[NH_3]^n[/tex]
Thus, by using the following steps, we can find both m (BF3 order of reaction) and n (BF3 order of reaction):
- Experiment 1 and 2 for the calculation of n:
[tex]\frac{r_1}{r_2}=\frac{k[BF_3]_1^m[NH_3]_1^n}{k[BF_3]_2^m[NH_3]_2^n}[/tex]
So we plug in to obtain:
[tex]\frac{0.2130}{0.1065}=\frac{k*0.250^m*0.250^n}{k*0.250^m*0.125^n}\\\\2=\frac{0.250^n}{0.125^n}\\\\2=2^n\\\\log(2)=n*log(2)\\\\n=1[/tex]
So the order of reaction with respect to NH3 is 1.
- Experiment 3 and 4 for the calculation of m
[tex]\frac{r_3}{r_4}=\frac{k[BF_3]_3^m[NH_3]_3^n}{k[BF_3]_4^m[NH_3]_4^n}[/tex]
So we plug in to obtain:
[tex]\frac{0.0682}{0.1193}=\frac{k*0.200^m*0.100^n}{k*0.350^m*0.100^n}\\\\0.57=0.57^m\\\\log(0.57)=m*log(0.57)\\\\m=1[/tex]
So the order of reaction with respect to BF3 is also 1.
Now, we can compute the rate constant by solving for it on any of the experiments there, say experiment 1:
[tex]k=\frac{r_1}{[BF_3][NH_3]} =\frac{0.2130M/s}{0.250M*0.250M}\\\\k=3.41M^{-1}s^{-1}[/tex]
Thus, the initial reaction rate for the 0.50M BF3 and 0.020M NH3 is:
[tex]r=3.41M^{-1}s^{-1}*0.50M*0.020M\\\\r=0.0341\frac{M}{s}[/tex]
Best regards!
Which of the following is NOT a major area of scientific study?
Answer:
Hate 2 break it 2 u foo but there's no option for me 2 choose....
What happens at all convergent plate boundaries?
Explanation:
At convergent plate boundaries two plates are moving towards one another and different scenarios are in play.
Most importantly, at these margins the crust is being destroyed.
At continental - continental crust margin, there is an uplift because the density of the two crust is similar and lesser than that of the mantle below. At continental - oceanic crust margin, subduction zones are found where the denser oceanic crust sinks beneath into the mantle. This is also the case with ocean - ocean convergence zone.Some of the features found at this margin include, oceanic trenches, accretionary wedges, volcanic islands, earthquakes
can u pls help me with this question
i think its volume but im not 100% sure
Answer:
D.
Explanation:
cuz liter is volume
how does mixture relate to your life
PLEAEEEE QUICKKKK AND FASTTT
How many hydrogen atoms are in 5 molecules of isopropyl alcohol, C3H7O ?
Answer:
The answer is "35 atoms".
Explanation:
The Formula for isopropyl alcohol is: [tex]C_3H_8O[/tex]
In 1 molecule of [tex]C_3H_8O[/tex] = 8 atoms of hydrogen
In 4 molecule of = atoms of hydrogen
According to the given formula [tex]C_3H_7O[/tex]
In 5 molecule of [tex]C_3H_7O[/tex] [tex]= 5 \times 7 = 35[/tex] atoms of hydrogen.
5/10
When you put sodium metal in liquid ammonia, what is the
intermolecular' attraction between Nations and NH3
molecules?
a Covalent bonds
Answer: ion dipole
Explanation: ck-12 said it was correct
Describe how the energy in ocean waves could be transformed into electrical energy.
Answer:
ocean waves are converted to electricity with wave energy converter, or WEC, devices. ... The surface portion moves faster than the submerged part, and the WEC converts that relative motion into electricity
The energy in ocean waves that should be transformed into electrical energy is because of Buoyant objects.
Energy in ocean waves transformation:Buoys and turbines should be considered as the two examples of devices that can be used to capture the energy from the ocean's movement.
Buoys are considered to be structures that float on the sea and move up and down with the motion of the waves.
Learn more about energy here; https://brainly.com/question/17172186